79870515 has 16 divisors (see below), whose sum is σ = 127905696. Its totient is φ = 42560000.

The previous prime is 79870507. The next prime is 79870517. The reversal of 79870515 is 51507897.

It is not a de Polignac number, because 79870515 - 2³ = 79870507 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79870517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27115 + ... + 29915.

It is an arithmetic number, because the mean of its divisors is an integer number (7994106).

Almost surely, 2^79870515 is an apocalyptic number.

79870515 is a deficient number, since it is larger than the sum of its proper divisors (48035181).

79870515 is a wasteful number, since it uses less digits than its factorization.

79870515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4710.

The product of its (nonzero) digits is 88200, while the sum is 42.

The square root of 79870515 is about 8937.0305471113. The cubic root of 79870515 is about 430.6543399899.

The spelling of 79870515 in words is "seventy-nine million, eight hundred seventy thousand, five hundred fifteen".